Boxiand johjst statham



R. J. STATHAM.

WRENCH.

APPLICATION men ocr. 5, ms.

1 305, 628 Patented June 3, 1919.

have invented certain new ROLAND JUHN s'rn,

OF VANCOUVER, BRITISH COLUMBIA, CANADA.

WRENCH.

Specification of Letters Patent.

Patented June 3, 1919.

Application filed October 5, 1918. Serial No. 257,030.

To all whom it may concern:

Be it known that I, ROLAND JOHN S'ra'r- HAM, a subject of the King ofGreat Britain, and a resident of the city of Vancouver, in the Provinceof British Columbia, Canada,

and useful ID1- provements in Wrenches, of which the following is aspecification.

My invention relates to improvements in wrenches of the adjustable type,and the object of my invention is to devise a wrench of this charactercapable of gripping not only the flat sides of a nut but, with equalfacility, the corners as well and which need not be removed from the nutwhen a fresh grip thereon is desired, thereby providing-a tool of greatutility, an incidental advantage of which is that it may be used withgreat convenience as pliers in addition to its use as a wrench.

I attain this object by the construction illustrated in the accompanyingdrawings in which- Figure 1 is a side view of my wrench.

Fig. 2 is an edge view.

Similar figures refer to similar parts throughout t e several views.

The wrench is formed as shown in Fig. 1 and consists of the usual shankor handle 1 provided with an integral rigid jaw 2 and the adjustable jaw3 having the tongue 4 slidably mounted in the slot 5 of the head 6, thelower edge of the tongue being provided with threads 7 with whichcooperates the worm nut 8, rotatably mounted in the gap 9 on the fixedpin 10.

Up to this point the construction of the wrench is similar to thewell-known types of adjustable wrench in which adjustment of the jaws iseffected by means of the worm nut 8, this nut, however, in those typesbeing incapable of lateral movement. According to my present inventionthe gap 9 is made considerably lon er than the length of the worm 8 sothat t e worm, and therefore the adjustable jaw 3 also, are laterallymovable on the head of the wrench without necessitatin the rotation ofthe worm, giving slack or p ay, or in other Words, the jaw 3 is loose]mounted on the head so as to be capable 0 lateral movement or playwithout the screw action required in such wrenches in use at the presenttime, the operation of the jaw 3 laterally toward the fixed one 2 beingcontrolled by a pressed steel lever 11 pivotally mounted on the head 6by means of a pin 12 which extends through the jaws 13 and 14 of thelever adjacent their upper ends 15 and 16, these jaws extending on eachside of the wrench handle and havlng their upper ends adaptedto engagethe end of the worm nut 8, as shown in Fig. 1. The jaw 3 may beretracted manually but if desired its automatic retraction on release ofthe lever 11 may be secured by inserting in the gap 9 a tension spring17, as shown in Fig. 1, the worm 8 belng recessed to receive the end ofthe spring. Both jaws 2 and 3 are provided with oppositely facingnotches 18 adapted to fit the corners of a nut, as hereinafterdescribed.

The manner in which the wrench operates will be apparent on referencebeing had to Fig. 1, as it will be seen that the jaws being open andlaced on a nut and the shank 1 and lever 11 gripped in the hand, thehand pressure will close the lower end of the lever on the shank and theupper ends 15 and 16 of the jaws 13 and 14- will thereforebear on theend of the worm 8 and move it laterally to tighten the jaw 3 on the nutso that it may be turned in the required direction. To take a fresh gripon the nut and on the corners thereof the pressure on the lever 11 isrelieved and the wrench swung around on the nut until the oppositenotches 18 engage the opposite corners of the nut, when the jaws may beagain tightened by renewed pressure on the lever. It will thus be seenthat the wrench may be worked all around the nut withoutremoval-therefrom and grips taken on the flats and corners alternately,while adjustment of the jaw space to different ranges of nut sizes ma bemade in the usual manner by the rotation of the worm 8. V

What I claim as my invention is:

In an adjustable wrench, a head havin a gap, a fixed jaw, a slacklaterally slida le aw having a tongue threaded on its lower edge passingthrough a gap in the wrench head, arotatable worm normally engaging thethreaded tongue and endwise movable in the gap and -a fulcrumed leveradapted when grlpped with the handle to bear at 1ts upper end end of theworm and effect endwlse movement of the same, said lever being arrangedjso that the point of contact of its upper end above its pivot directlyon the

